Origin

Usage note

In American English the pronoun you has been supplemented by additional forms to make clear the distinction between singular and plural. You-all,
often pronounced as one syllable, is a widespread spoken form in the
South Midland and Southern United States. Its possessive is often you-all's rather than your.You-uns (from you + ones) is a South Midland form most often found in uneducated speech; it is being replaced by you-all.Youse (you + the plural -s
ending of nouns), probably of Irish-American origin, is most common in
the North, especially in urban centers like Boston, New York, and
Chicago. It is rare in educated speech. You guys is a common informal expression among younger speakers; it can include persons of both sexes or even a group of women only.

Examples from the web for you

I'm delighted to see you.

Don't be afraid to try the same shot over and over until you get it right.

For you, kicking back in a camp chair is no vacation.

It should take you two and a half seconds to read this sentence.

If you are like most people, you will resist change.

your friends won't tell you, but we will.

As you would imagine, people thought that was ridiculous.

Also, if you are in a university you will not be recruited.

There is no reason why you should be bored when you can be otherwise.

It would only be so if you could produce or suggest something that it pretends to be and is not.

British Dictionary definitions for you

you

/juː; unstressed jʊ/

pronoun (subjective or objective)

1.

refers to the person addressed or to more than
one person including the person or persons addressed but not including
the speaker: you know better, the culprit is among you

2.

Also one. refers to an unspecified person or people in general: you can't tell the boys from the girls

3.

(mainly US) a dialect word for yourself or yourselves: you should get you a wife now See yourself

noun

4.

(informal) the personality of the person being addressed or something that expresses it: that hat isn't really you

5.

you know what, you know who, a thing or person that the speaker cannot or does not want to specify

Word Origin and History for you

Old English eow, dative and accusative plural of þu (see thou), objective case of ge, "ye", from West Germanic *iuwiz (cf. Old Norse yor, Old Saxon iu, Old Frisian iuwe, Middle Dutch, Dutch u, Old High German iu, iuwih, German euch), from PIE *ju.

Pronunciation of you and the nominative form ye
gradually merged from 14c.; the distinction between them passed out of
general usage by 1600. Widespread use of French in England after 12c.
gave English you the same association as French vous, and it began to drive out singular nominative thou,
originally as a sign of respect (similar to the "royal we") when
addressing superiors, then equals and strangers, and ultimately (by
c.1575) becoming the general form of address. For a more thorough
discussion of this, go here. Through 13c. English also retained a dual pronoun ink "you two; your two selves; each other."

Words for "you" in Japanese include anata (formal, used by a wife when addressing her husband), kimi (intimate, used among friends) or the rougher omae (oh-MAI-aye), used when talking down to someone or among male friend showing their manliness. Dial. you-uns, for you-ones, first noted 1810 in Ohio.

Superseded in Middle English by plural form you
(from a different root), but retained in certain dialects (e.g.
Philadelphia Quakers). The plural at first was used in addressing
superior individuals, later also (to err on the side of propriety)
strangers, and ultimately all equals. By c.1450 the use of thou
to address inferiors gave it a tinge of insult unless addressed by
parents to children, or intimates to one another. Hence the verb meaning
"to use 'thou' to a person" (mid-15c.).